#include <iostream>
using namespace std;
int main()
{
   int n;
   cin >> n;
   if(n%3 == 0)
   {
   	cout <<"3" <<" ";
   }
   if(n%5 == 0)
   {
   	cout << "5"<<" ";
   }
   if(n%7 == 0)
   {
   	cout << "7";
   }
   if(n%3!=0 && n%5 !=0 && n%7!=0)
   {
   	cout << "n";
   }
}

